| 摘要 |
PCT No. PCT/AT96/00124 Sec. 371 Date Jan. 5, 1997 Sec. 102(e) Date Jan. 5, 1997 PCT Filed Jul. 16, 1996 PCT Pub. No. WO97/03857 PCT Pub. Date Feb. 6, 1997A drive unit is composed of an internal combustion engine (1) and of a continuously controllable division gear which comprises a continuously controllable hydrostatic engine/pump unit (4) and a summator gear (10) with subsequent range gears (12, 13) for successive stepup ranges. In order to make this drive unit also possible at operating points within an interval containing the shift points, first the hydrostatic unit (4) is controlled further as far as the shift point, while the engine speed continues to remain constant, the clutch assigned to the next range is then closed and the desired vehicle speed is set by changing the engine speed and is maintained. |
